How do you kill the fear on mgs 3 snake eater?

You must gear Thermo Glass.... Try this instead: The first time you visit the area where you battle The Fear, equip the Thermal Goggles and find and KILL at least 6 (six) Poison Dart Frogs. DO NOT EAT them, they are POISONOUS!! When you return to this area later, Use the CURE selection and remove that arrow in your leg; it's coated with poison! Use the SERUM to cure the poisoning. Now, go into your Backpack and un-equip all unnecessary weapons. Keep the MK22 Hush Puppy and the EZ Gun (Very Easy Mode). Equip all 6 Poison Dart Frogs. Use the Thermal Goggles and wear the Flecktarn Camo (If you have it) to prevent battery drain. Keep you eyes in the trees and watch out for traps! You can beat him by standing in one spot the whole time, however. The Fear has an impressive leaping ability and can fly from tree to tree from great distance. Shoot him while he stops to leap to another tree. You will be draining his stamina and he will soon get hungry. When he starts complaining that he needs food, quickly equip a Poison Dart Frog and toss it out in the open. He will automatically go for the tossed food for rather than forage for food. He will pick up the food and immediately state,"It's poison!" His Life Gauge will start flashing and he will start grunting, "Oh!" every so often. Quickly re-equip your gun and shoot him as soon as he gets ready to jump from tree to tree (you should be able to get in 3 good shots). Throw out another PDF and get ready to shoot him again. This time, shoot him as soon as he eats the food! He may just throw up! Keep repeating this process and The Fear will be easily defeated! Not to mention, he will leave behind his Spider Camo which has an impressive +70 (80%) camo index rendering you nearly invisible to enemies! The down side is, you will get hungry and have to eat twice as often as this Camo causes Stamina drain.